Steam-boiler and furnace



3 Sheets-Sheet l.

(No Model.)

H. STANTON.

STEAM BoILER AND PURNAGB.-

Patented Mar. 29, 1898.

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(No Model.) 3 Sheets-Sheet 2.

H. STANTON. STEAM BOILER AND PURNA'GE.

No. 601,358. Patented Mar. 29, 1898.

@Witwe/awo (No Modem 3 sheets-sheen 3.

H. STANTON.

STEAM BOILER AND FURNAG. y No. 601,358. Patented Ma,1.29,1898.

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Widmann Nirnn STATES Y ATFNI LEEME@ HENRY STANTON, OF FLUSIIING, OHIO, ASSIGNOR OF TIVO-THIRDS TO HOWARD KIRK, MADISON ALDREDGE, AND O. L. WEEMS, OF ST.

OLAIRSVILLE, OHIO.

STEAM-BolLR AND FURNACE.

SPECIFICATION forming part of Letters Patent No. 601,358, dated March 29, 189e.

Application filed May 17, 1897. Serial No. 636,964. (No model.)

. boiler having both perfect combustion and perfect circulation.

To these ends the invention consists in the peculiar construction hereinafter more fully described and then definitely claimed at the end hereof.

In the accompanying drawings, Figure 1 is avertical central section of a boiler embodying my improvement. Fig. 2 is a cross-section of the same through the line :i: x, Fig. 1. Fig. 3 is a similar section through the line y y, Fig. 1. Figs. 4, 5, and 6 are details which will be more fully referred to hereinafter.

Referring now to the details of the drawings by numerals, 1 indicates the outer shell of the boiler, having legs 2 bolted thereto at suitable intervals. 3 is the outer wall, and 4 the4 inner wall, of the furnace, protected by fire-brick 5 at the sides and the perforated tiles or arch blocks 6. The lire-bricks 5 rest upon flanges 7, riveted to the plates forming the walls 3 and 4. The outer shell and the wall 3 'are connected `at bottom by the plate 8, having turned-down flanges. wall 4 is in the form of a tube, inside of which is another tube 9, and these two tubes are connected byscrew-plugs 10, one end of each of which projects into the fire-box or compbustion-chamber. v The outer wall and the boiler-shell are connected in the same manner; but part of most of the plugs in this case extend through into the smoke-chamber surrounding the boiler. The inner and outer walls of the fire-box are connected lat top by the annular crown-plate 11, strengthened by the crown-bar and bolts 13.

Connected to the tube 91s an upwardly-in- The `inner clined annular plate 9' to direct the uprising Vwater over the crown-plate, which serves to keep said crown-plate clean. The annular plate 9 may bemade of several plates secured in any convenient manner.

In the center of the tube 9 is a shaft set in -a step 15, mounted on a step-bar 16, bolted to the inner wall or tube 4, which shaft carries a screw or propeller 17 at the bottom and a bevel-wheel18, gearing with another bevelwheel 19 on a shaft 20, which passes through a stuffing-box 21 and carries on its outer end a pulley 22, intended to be driven from any convenient source of power.

The grate-bars 23 are shown resting on two rings 24, connected by cross-bars 25. The rings rest on idlers 26, and the outer ring has bolted to it a series of castings forming a circular rack 27, which is driven by a pinion 28, mounted on a suitable shaft and having a iange 29which helps to support 'the weight of the outerring with thebars and fuel.

Below the bar 16 is a distributer and mudcollector 30, provided with a suitable blow-off 31 and tubes 32, terminating in Ts 33, which communicate with the space between the shell and the outer wall of the fire-box. Below the Ts are blow-offs 34. i

The ilues shown at 35 pass through the outer wall of the fire-box and combustion-chamber, by which means the products of combustion pass into the smoke-chamber 36, formed between the shell 1 and the inner jacket 37, the upper part of which is surrounded by an outer air-jacket 38. In the smoke-chamber there are a series of bricks or tiles 39, set diagonally or spirally around the boiler, forming a series of spiral passages for the heated products of combustion. These bricks are formed with projections 40 to rest against the studs, which thus form a support for the bricks, and as the products of combustion pass through the passages between the bricks they come in contact with the lower side of the same, by which means all the caloric that can be communicated to the water in the boiler isextracted from the heated products of combustion instead of passing off Without doing useful duty. As a further savingl of the heat generally wasted I use the second or air jacket 38, be-

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fore referred to, which passes-up and around the smoke-stack 4l and having air-inlets 42, through which air is drawn down by a blower 43 and driven into the annular hot-air pipe 44, from whence the heated air is distributed by pipes 45, leading to the iire-boX, and other e pipes 46, discharging into the ash-pit, and

still other pipes 47, leading to passages 48 through the bricks surrounding the inner wall 4 of the fire-box.

The smoke-stack has a series of tubes 49 passing through it which will absorb nearly all the heat that remains at that point in the products of combustion and will transfer the same to the air that enters through the inlets above, which air as it descends is still further heated by the surface of the jacket 37, so that not only is there but little heat lost, but the air to support combustion is thoroughly heated before it enters the ash-pit or nre-pot. Instead of tubes 49 solid plugs may be used.

. double that on the inside.

necessary that the cam should be of the pe- In order to get the most advantage from the products of combustion, baffle-plates 50 are set in the smoke-stack, so as to deliect the smoke, &c., against the jacket 37.

Around the iireeboxes may be set suitable doors 5l for stoking purposes; but to produce the best effect I propose to use a mechanical feeder which will spread the fuel regularly over the grate as it revolves under said feeder. In carrying out this part of my invention I intend to use the apparatus shown in my drawings, but do not limit myself to this, as the motion may be given to the feeder or chute which spreads the coal over the fire by other constructions without departing from the spirit of my invention. At 52 is shown a chute, which is pivoted at 53 and is provided with an arm 54, which rests against a cam 55 on a rotary shaft 56, which carries a sprocketwheel 57, giving motion through the drivechain 58 to the sprocket-wheel 59, driving a feed-wheel 60 in the hopper 6l. This cam is of such shape as to Vgive the chute a differential feed as it moves over the grate, so as to feed the fuel substantially at the same rate over the entire surface of the grate whether it is delivering it at the outer or inner surface of the same. It is obvious that if the cam were of such shape as to give the chute `a regular motion it would feed as much fuel at the inner edge of the fire-box as at the outside edge, whereas if a circle is drawn around the grate at an equal distance from the inner and outer edges of the fire-box the grate-surface on the outside of the circle would be nearly It is therefore culiar shape shown in the detail figure of the feeding apparatus, Fig. 6.

In order to prevent the chute from being burned out, I propose to make it hollow, as shown in the enlarged detail Fig. 6, so that acurrent of water may pass through it which will enter at one of the hollow pivots (indicated at 53) and out at the other. This water may pass into the boiler as feed-water, if desired. In order to prevent the passage of the heated gases from the fire passing up and out under the feeder, I attach an apron 62 to the back of the same, which rises and falls with it and thus keeps the opening tolerably tight.

In making my boiler I propose to use plugs like those shown, but do not limit myself to this particular form. The plugs are made with either one or two enlarged parts l0/, which are screw-threaded to be screwed into the two adjacent parts, and then the outer edge (which is undercut for that purpose) is riveted down.

The tubes forming the fines 35 are screwthreaded for their whole length, and after being screwed in are riveted over on both ends.

The crown-bars are sustained by stay-bolts ...some parts of the grate partially uncovered,

to avoid which the gearing should be so arranged that on the next revolution of the grate the points of the zigzag line of feed should come between the points of the zigzag line of the feed or the previous revolution of the grate, and thus the feed of fuel would be substantially even over the whole grate. A 'complete and perfect circulation of the Water is kept up by the use of the screw or propeller 17, for it draws down the water through the central passage and drives part of it through the pipes 32 and Ts 33 in to the space between the outer wall 3 of the nre-box and the shell l, where it is spread by the Ts and afterward rises up to be again drawn down, as before. The other part of the water passes up between the tubes 4 and 9 and over the top of the crown-sheet to be drawn down again, as before. It will be noticed that there are no opposing currents in this boiler, all the water in the main part of the boiler being bound to travel in the same direction.

From the peculiar arrangement and construction of this boiler it will be found that a perfect feed of the fuel, a perfect combustion of the same, and a perfect circulation of IOO IIO

IIS

the water have been obtained, and that all of to draw water from the center passage and force it into the concentric chambers, substantially as described.

3. The combination in aboiler, of two concentric water-chambers, a concentric grate and fire-box between them, said fire-box being lined with fire-brick and provided with a perforated arch brick dividing the flamespace, substantially as described.

t. The combination in a circular boiler, of a smoke-passage, a series of bricks set therein arranged to make spiral passage-ways for the products of combustion and a series of supports for said bricks extending horizontally from the boiler, substantially as described.

5. The combination with a boiler having an annular lire-box of an outside smoke-passage, an air-chamber surrounding the same, passages carrying air to the inner part ofthe annular'fLre-box,and means for drawing down the air from said air-chamber and forcing it into the air-passages, substantially as described. y

6. The combination with a boiler and furnace, of-a smoke-stack, an air-jacket surrounding the same and a series of heat-absorbing devices passing through the smokestack and projecting into the air-passage, substantially as described.

7. In combination with the fire and water chambers of a boiler, studs having an enlarged threaded portion near their centers and adapted to be screwed into the boilersheets and then riveted against the same, substantially as described.

8. The combination in a boiler, of a smokepassage, a series of absorbing-studs projecting therein, and a series of lire-bricks resting on said studs arranged to form spiral passages for the products of combustion, substantially as described.

' 9. The combination with a circular rotary grate, of a fuel-feeder and means for giving said feeder a faster motion over the inner an inclined upper surface Whose upper edge rises above the iiues running through the side of the boiler.

12. In a furnace-feeding apparatus, a vibrating chute provided with an apron to close the opening under the chute, substantially as described.

In `testimony whereof I affix my signature, in the presence of two witnesses, this 10th day of May, 1897.

HENRY STANTON. 4Vitnesses:

THos. E. ROBERTSON, W. E. CLENDANIEL. 

